Male Student/Female Teacher manga

There don't seem to be as many series like this as there are with the genders reversed (female student/male teacher), and considering I've looked into a number of ones like that, I figured I'd try to take suggestions for more of the opposite.

The only ones I know of right now are Onegai Sensei, Unbalance x Unbalance, and Teacher's Pet (as well as it's sequel).

Also, on a completely unrelated topic, any suggestions that involve a protagonist in a relationship with an antagonist (or someone fulfilling that kind of role--not just something like a school rival) would be welcome too. I'm in a forbidden relationship kind of mood.

its okay...but he/she already has what you recommended...in fact...i'm looking for something like this myself...you know anymore female teacher, male student manga? other than the ones already mentioned